function getViewportHeight() {
    if (window.innerHeight!=window.undefined) return window.innerHeight;
    if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;
    if (document.body) return document.body.clientHeight; 

    return window.undefined; 
}
function getViewportWidth() {
    if (window.innerWidth!=window.undefined) return window.innerWidth;
    if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth;
    if (document.body) return document.body.clientWidth; 

    return window.undefined; 
}

function getScrollTop() {
    if (self.pageYOffset)
    {
        return self.pageYOffset;
    }
    else if (document.documentElement && document.documentElement.scrollTop)
    {
        return document.documentElement.scrollTop;
    }
    else if (document.body)
    {
        return document.body.scrollTop;
    }
}
function getScrollLeft() {
    if (self.pageXOffset)
    {
        return self.pageXOffset;
    }
    else if (document.documentElement && document.documentElement.scrollLeft)
    {
        return document.documentElement.scrollLeft;
    }
    else if (document.body)
    {
        return document.body.scrollLeft;
    }
}

//--初始化变量--
var rT=true;//允许图像过渡
var bT=true;//允许图像淡入淡出
var tw=150;//提示框宽度
var endaction=false;//结束动画
var ns4 = document.layers;
var ns6 = document.getElementById && !document.all;
var ie4 = document.all;
offsetX = 10;
offsetY = 20;
var toolTipSTYLE="";
function initToolTips()
{
    tempDiv = document.createElement("div");
    tempDiv.id = "toolTipLayer";
    tempDiv.style.position = "absolute";
    tempDiv.style.display = "none";
    document.body.appendChild(tempDiv);
    if(ns4||ns6||ie4)
    {
        if(ns4) toolTipSTYLE = document.toolTipLayer;
        else if(ns6) toolTipSTYLE = document.getElementById("toolTipLayer").style;
        else if(ie4) toolTipSTYLE = document.all.toolTipLayer.style;
        if(ns4) document.captureEvents(Event.MOUSEMOVE);
        else
        {
          toolTipSTYLE.visibility = "visible";
          toolTipSTYLE.display = "none";
        }
        document.onmousemove = moveToMouseLoc;
    }
}
function toolTip(msg, fg, bg)
{
    try {
      if(toolTip.arguments.length < 1) // hide
      {
        if(ns4) 
        {
        toolTipSTYLE.visibility = "hidden";
        }
        else 
        {
          //--图象过渡，淡出处理--
          if (!endaction) {toolTipSTYLE.display = "none";}
          if (rT) document.all("msg1").filters[1].Apply();
          if (bT) document.all("msg1").filters[2].Apply();
          document.all("msg1").filters[0].opacity=0;
          if (rT) document.all("msg1").filters[1].Play();
          if (bT) document.all("msg1").filters[2].Play();
          if (rT){ 
          if (document.all("msg1").filters[1].status==1 || document.all("msg1").filters[1].status==0){  
          toolTipSTYLE.display = "none";}
          }
          if (bT){
          if (document.all("msg1").filters[2].status==1 || document.all("msg1").filters[2].status==0){  
          toolTipSTYLE.display = "none";}
          }
          if (!rT && !bT) toolTipSTYLE.display = "none";
          //----------------------
        }
      }
      else // show
      {
        if(!fg) fg = "#ff6600";
        if(!bg) bg = "#eeeeee";
        var content =
        '<div id="msg1" name="msg1" class="trans_msg">'
         + msg +
        '</div>';
    
        if(ns4)
        {
          toolTipSTYLE.document.write(content);
          toolTipSTYLE.document.close();
          toolTipSTYLE.visibility = "visible";
        }
        if(ns6)
        {
          document.getElementById("toolTipLayer").innerHTML = content;
          toolTipSTYLE.display='block'
        }
        if(ie4)
        {
          document.all("toolTipLayer").innerHTML=content;
          toolTipSTYLE.display='block'
          //--图象过渡，淡入处理--
          var cssopaction=document.all("msg1").filters[0].opacity
          document.all("msg1").filters[0].opacity=0;
          if (rT) document.all("msg1").filters[1].Apply();
          if (bT) document.all("msg1").filters[2].Apply();
          document.all("msg1").filters[0].opacity=cssopaction;
          if (rT) document.all("msg1").filters[1].Play();
          if (bT) document.all("msg1").filters[2].Play();
          //----------------------
        }
      }
    } catch(e) {}
}
function moveToMouseLoc(e)
{
  var scrollTop = getScrollTop();
  var scrollLeft = getScrollLeft();
  if(ns4||ns6)
  {
    x = e.pageX + scrollLeft;
    y = e.pageY - scrollTop;
  }
  else
  {
    x = event.clientX + scrollLeft;
    y = event.clientY;
  }
  
  if (x-scrollLeft > getViewportWidth() / 2) {
      x = x - document.getElementById("toolTipLayer").offsetWidth - 2 * offsetX;
  }
  
  if ((y+document.getElementById("toolTipLayer").offsetHeight+offsetY)>getViewportHeight()) {
    y = getViewportHeight()-document.getElementById("toolTipLayer").offsetHeight-offsetY;
  }
  toolTipSTYLE.left = (x + offsetX)+'px';
  toolTipSTYLE.top = (y + offsetY + scrollTop)+'px';
  return true;
}
initToolTips();
